An oligomer of the bis-uracil derivative as an organic thermal stabilizer with a super low migration ratio for PVC

Harmonizing Elastic Modulus and Dielectric Constant of Elastomers for Improved Pressure Sensing Performance

“…The elastic modulus of elastomer is clearly correlated to its cross-link density due to its elasticity originating from the conformational entropy of polymer chains . According to classic Flory−Huggins theory prediction, as the average molecular weight of a polymer decreases, the free volume of its chains increases, resulting in a lower physical entanglement in the polymer network . Therefore, the elastic modulus can be reduced by decreasing its average molecular weight.…”

“…31 According to classic Flory−Huggins theory prediction, as the average molecular weight of a polymer decreases, the free volume of its chains increases, resulting in a lower physical entanglement in the polymer network. 32 Therefore, the elastic modulus can be reduced by decreasing its average molecular weight. In traditional polyurethanes (PU), chain extenders are used to increase the average molecular weight of the polymer or to increase the cross-linked density in the polymer network.…”